Fire-fighting device of pulse action

FIELD: fire-fighting equipment.

SUBSTANCE: invention relates to small fire-fighting devices and can be applied for extinguishing fires of solid and liquid substances, electric plants under voltage to 1000 W, automobiles, tele- and radio equipment in initial stage of fire beginning, in premises and open areas. Fire-fighting device of pulse action, equipped with fire-extinguishing powder and expelling charge, consists of placed one after another ignition and expelling compositions in given proportions of their components and weight ratios, equipped with powder sparger, brought into action from capsule of lighter "Zhevelo" by means of percussion-lock.

EFFECT: increase of fire-extinguishing action by increasing its work stability and improvement of exploitation properties.

1 dwg

 

The invention relates to the field of fire safety and can be used in the manufacture of fire extinguishers, designed to extinguish fires of solid and liquid substances, electrical equipment under voltage up to 1000 V, automobiles, television and radio in the initial stage of occurrence of fires in buildings and outdoor areas.

Currently one of the most promising ways of fighting fires is a pulsed technique multipurpose protection. One of the important advantages of the impulse fire extinguishing devices is the ability to throw and spray any granular, powder, liquid and viscous compositions in a wide temperature range and under any climatic and weather conditions (Shakhmatov Century, Pyatov A. Pulse technique - new possibilities in the fight against fire. Fire case. - 1997. - 300 C.).

Known powder mini fire extinguishers "Baby" (specifications IBAG 634233. 002 TU. Gap Metalist gchapiewski, 1992) and "Dwarf" (Technical conditions DITL 634233. 001 TU. Mykolaiv branch of the Central research Institute of shipbuilding technology, 1991)designed to extinguish fires in the cases above.

These extinguishers consist of a body, extinguishing powder, piston, lifting charge and igniter head. As the lifting charge, they used the smoky Rogan the nd powder brand PE-3. Weight lifting charge in the mini fire extinguisher "Baby" is 3±0.5 g, as in "Gnome" - 1,25±0,03, This ensures that the release of fire extinguishing powder weighing 280±10 g ("Baby") and 150±1 g ("Dwarf") at a distance of at least 5 meters

The disadvantages of both fire extinguishers are significant recoil force arising from the carrying out of action due to an abrupt pressure rise in the combustion lifting charge, and the lack of dispersion for this reason, extinguishing powder from a fire, which significantly reduced their real fire extinguishing capability.

Closest to the proposed invention is a Powder mini fire extinguisher" (Patent RF №2099112 from 20.12.97. Bull. No. 35), in which the lifting charge system is used, consisting of sequentially adjacent incendiary composition (Pb3O4- 75-88%, Ti - 12-15%) and gas-generating composition (NaN3- 64%, Fe2O3- 36%).

Replacement smoke of gunpowder to the system from the gas-generating and igniter compositions allowed to exclude the use of the fire extinguisher throwing explosives and to reduce twice the recoil force when it is triggered (table).

Practice subsequent trials of this fire extinguisher revealed some shortcomings, which led to the decrease in the stability of its work, which, in turn, with Igalo fire extinguishing capability of the device. For example, in the case of fire with 4-5 m in length, recommended for prototype) model focus 3V (combustible material - 3 l of petrol, the area of the hearth - 0,094 m2) there was a very low efficiency in the use of fire extinguishing powder, because it is the number that falls in the hearth, was significantly below the standard required. This was due to insufficient dispersion of the powder to the goals and the difficulty of getting into the hearth with such a large distance. Last but not least, this fact caused by the use of grating igniter to initiate the igniter composition of the fire extinguisher and still going strong sound effect accompanying the operation of the device. It was all down accurate aiming when extinguishing a fire extinguisher to hand. In addition, it was repeatedly mentioned the contact of the piston with which has thrown out the powder from the device, into the fire that was caused by splashing of gasoline. It was also found that upon actuation of the fire extinguisher was the release of solid red-hot slag, which is unacceptable in the work of extinguishing devices.

It should be noted that when storing a fire extinguisher is sliianie fire extinguishing powder, which also dramatically reduces the quenching efficiency.

The technical result, the solution of which the CSOs aimed invention, is to increase the fire extinguishing action of the device by increasing the stability of its operation and improvement of operational properties.

The technical result is achieved that the fire extinguishing device is pulsed with a frame containing a fire extinguishing powder, piston, lifting charge and igniter head with igniter plug, the body decorated with a special divider powder and lifting charge consists of sequentially adjacent igniter composition (KClO4at 53.4%, NaN3- 39.3%, and soot - 7,3%, synthetic rubber, fluorine-containing SCF-26 - 2% (over 100%), placed in the sleeve, the lifting part (KCl4- 40,1%, NaN3is 29.5%, soot - 5,4%, chalk construction 25,0% (synthetic rubber fluorine-containing SCF-26 - 2% (over 100%), located in a cardboard casing which serves as both a piston and which is initiated by a primer-igniter "Revelo" using a trigger device, and the mass of the igniter and explosive compositions are taken in the ratio of 1.0 to 1.5 ppm (mass fractions) 4.0 to 5.0 ppm, respectively.

The attempts to modernize the mini fire extinguisher "Baby" by only reducing the efforts of return (prototype)that occur when bringing it into action, has shown the inability to achieve stable operation of the device without his principialnogo the changes. This was caused by the following:

in the result storage fire extinguisher is sliianie fire extinguishing powder, and therefore all its mass at the shot and the flight almost behaves as a single unit, raspalas very slightly;

- the extinguishing of the fire from a distance of not less than 4-5 m (recommended for prototype) is ineffective because of the difficulty of hitting the target while holding a fire extinguisher hands. In this context, it is undesirable and method of initiation of the explosive charge with grating igniter, high recoil force when the fire extinguisher and strong sound effect, which it is accompanied, as it also makes aiming;

- design of the prototype involves the application of special massive plastic piston which during operation of the fire extinguisher throws powder and crashes itself. It was observed that when hit by burning gasoline (the fire), he contributes his splashing, which is unacceptable;

- noticed that upon actuation of the fire extinguisher "Baby" (the prototype) were often observed the emission of hot slag, which is also unacceptable.

The tests showed that the fire extinguishing capability and stability of the pulse device is largely dependent upon the effectiveness of spraying them on newsasia powder from a fire, the method of initiating its lifting charge and on the characteristics of the latter. It was also shown that the greatest extinguishing effect of pulsed devices class mini fire extinguisher "Baby" (prototype) is achieved for fire model fire 3V (0,094 m2) from a distance of 1-2 meters

It is established that most of the fire extinguishing ability of the mini-fire extinguisher while maintaining high stability can be achieved while reducing arise during operation of the device the efforts of return, replacement grating method of ignition of the explosive charge on the impact and application of special divider powder.

Comparative data for testing prototype "Baby" and modernized pulse device "Pulse" is presented in the table. During the tests were conducted extinguishing class a (solids) and b (flammable liquids). As the fire class used In the model focus 3V, which was a metal container with a diameter of 350 mm, depth 150 mm, and as fuel used petrol a-76 in the amount of 3 liters On the bottom of the tank poured into 3 l of water, which was used as a pillow. As the focus of the class And used pieces of wood combustion space of 0.4 m2. Quenching model core was made from a distance of 1-2 m from the hands. Each device COI is tivali not less than three times.

The results of the test pulse device shown in the table.

The type of fire extinguishing devicesThe mass of the igniter composition, gWeight lifting composition, gThe recoil force, kgfThe mass of ejected extinguishing powder gThe method of initiation of the explosive chargeModel focus 3V, m2Note
"Baby" prototype1,22,016280±10MDF KB0,094Not extinguished
"Baby" prototype1.22,518280±10MDF KB0,094Extinguished
"Baby" prototype1,23,019,5280±10MDF KB 0,094Not extinguished
"Pulse"0,30,87,5300±10Shock KB "Revelo"0,094Extinguished
"Pulse"0,20,86,0300±10Shock KB "Revelo"0,094Extinguished
"Pulse"0,21,07,0300±10Shock KB "Revelo"0,094Extinguished

As can be seen from the data presented in the table, replace the igniter and explosive compositions containing metals and their oxides (prototype), to compositions not containing grating and method of ignition of explosive composition (prototype) drums (using KB "Revelo"), with the exception of construction solid plastic piston (prototype), as well as the use of divider extinguishing powder special design the products significantly reduce the recoil force and the accompanying operation sound effect, to achieve good dispersion of the powder in the fire that led to the stable operation of the device "Pulse" and its high fire-extinguishing ability.

The drawing shows the invention - design of the modernized extinguishing pulse device "Pulse", where:

1 - cover transport;

2 - divider;

3 - body;

4 - extinguishing powder;

5 - body lifting charge;

6 - lifting structure;

7 - igniter composition;

8 - KB "Revelo";

9 - release lever;

10 - the trigger device;

11 - safety plate;

12 - igniter plug;

13 - a protective cap;

14 - o cardboard circle.

The principle of the device based on the throwing of fire extinguishing powder (4) to the fire energy generated by the combustion of the pyrotechnic composition (6, 7) gaseous products.

The device is designed to operate without removing the conveyor cover (1).

The device operates as follows.

When the fire extinguishing device should take for case (3). Remove the protective cap (13) (turning and sergiwa it on yourself). Bring the device to the fire at a distance of 1-2 m to Pull the safety plate (11), cock the firing mechanism with the trigger lever (9), N. the edit device dolzam to the fire and move your finger left the trigger lever (9).

After pulling out the safety plate (11) and the shift release lever (9) firing pin firing mechanism (10) strikes the primer-igniter "Revelo" (8), which, actuating, ignites pyrotechnic compositions: igniter (7) and lifting (6). Gaseous combustion products of the composition while under pressure, throwing fire-extinguishing powder (4) through a divider (2) to the fire. Transport cap (1) with o-ring (14) fly away to the side attached to the device using nylon thread, not falling into the fire.

Extinguishing the fire is achieved by isolating the powder fire burning from air and mechanical breakdown flame shock effect of the jet of powder.

In accordance with the applicable regulatory documents were developed and registered in the Samara Centre of standardization, Metrology and certification specifications for fire extinguishing device 4854-001-21142193-98 TU.

Conducted sanitary certification of the device obtained a health certificate CE from June 30, 1998.

Conducted exploratory tests of the device at the landfill fire test laboratory CRCL ATC under the administration of the Samara region with the participation of these representatives of the interior Ministry of Russia and the Institute of Ministry of internal Affairs of the Russian Federation, with the consequence that uti is snoe device has been recommended for use in extinguishing small fires solids (class a), flammable liquids (class B), gaseous substances (class C), the electrical equipment under voltage up to 1000 V (class E) and in the engine compartments of cars as addition to the basic fire fighting facilities. Objects applications: musculoskeletal and baggage compartments of vehicles (cars, boats, and the like), radio, TV equipment and electrical equipment under voltage up to 1000 V, garages.

The fire extinguishing device is pulsed with a frame containing a fire extinguishing powder, piston, lifting charge and igniter head having a sleeve, characterized in that the casing is complemented by a divider powder and lifting charge consists of sequentially adjacent igniter composition: potassium perchlorate (KClO4) at 53.4%, sodium azide (NaN3) - 39.3%, and soot - 7,3%, synthetic rubber, fluorine-containing SCF-26 - 2% (over 100%), placed in the sleeve, and a lifting composition: KClO4- 40,1%, NaN3is 29.5%, soot - 5,4%, chalk construction and 25.0%of the synthetic rubber, fluorine-containing SCF-26 - 2% (over 100%), located in a cardboard casing which serves as both a piston and which is initiated by a primer-igniter "Revelo" using a trigger device, and the mass of the igniter and explosive compositions are taken in the ratio of 1.0 to 1.5:4,0-5,0 ppm, respectively.



 

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